Sewing machine for securing stay cords and thrum ends



2 Sheets-Shet 2.

(No Model.)

A; SHEA. $EWING MACHINE FOR SECURING STAY GORDS AND THRUM ENDS.

Patented June 11, 1889.

UNITED STATES PATENT OFFICE,

ALBERT sum, or nosToN, MASSACIIUSE'MS, AssIeNoR To Joun REESE, OF

' SAME- PLACE;

SEWING-MACHINE FOR'SlECURING STAY-CQR'DS AND THRUM ENDS.,

SPECIFICATION forming part of Letters Patent No; 405,228, dated un -11,1889, Application fild April 11, 1888 emu No. 270,329. on. may

To all whom it n my concern: I

Be itknown that I, ALBERT SHEA, of Boston, county of Suffolk, State ofMassachusetts, have invented an Improvement in Sewing-Ma- 5 chines forSecuring Staying and 'lhrum Ends,

of which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention has for its object the production of a machine by whichtoeasily overstitch and secure to one side of a piece of material astay-cord and thrum ends.

pointed needle is made to enter the material and emerge therefrom at oneand the same side thereof, and the loop of thread carried by guide orbar, while thefeeding device-preferably a serrated dogengages thematerial at the under side, of the said guide or bar and moves it, theneedle and the feeding. device and guide or bar havinga movement onewith relation to the other in such manner that the needle at one thrustor descent enters the' material and emerges therefrom at one and thesame side, and at one side the st' y-cord and thrum ends, the nextdescent or thrust of the needle performing the" same operation, but atthe opposite side of the stay-cord and thrum ends.

"My invention consists, essentially, in the o. combination, withstitch-forming mechanism and feeding mechanism, of a bar or guideinteilposed between the feed and presser-foot, an over which thematerial to be stitched is bent, the needle forming part of thestitching 5 sewing-machine .forsecuring the stay-cord.

foot resting upon the said material on the said:

mechanism in its descent passing alternately into and out from the sameside of the mate-- and thrum-ends to button-pieces, the followinginstrumentalities, viz: an eye-pointed thread -carrying needle andcomplemental stitch-forming mechanism, means to collect the-thrum endsparallel to and about the staycord, a guide or bar having its effectiveendat right angles'to the direction of the feed, and a feeding dog ordevice to engage and move the material, the needle in itsoperationentering the material and emerging therefrom at one and the same sidethereof, and at one side of, the collected stay-cord and thrum- I ends,and at its next descent entering said In accordance with my invention aneyematerial in like manner, ,but'at the other side of the collectedstay-cord and thrum ends,

the combination being and operating substantially as will be described.j Figure 1 is a front side elevation ofa suf- I ficient portion of asewing-machine with my improvements added to enable my invention to beunderstood. Fig. 2 is a partial section in the line a:,Fig 1. Fig. 3 isa left-hand end elevation of the machine shown in Fig. -1,partiallybroken out. Fig. 4 is a partial top view of the bed of the machinebelowdotted line 0a, chieflyto show the guide orbar upon'which reststhematerial to be stitched. Fig. 5 is an enlarged detail of thelocking-arm, instrumental in vibrating the needle-carrying head orblock; 'Fig. 6, a section of Fig. 5 in the-line 8o 00 Fig. 7, adetailshowing the end of the guide or bar with a piece of materialbentover it .in condition to be penetrated by the descending needle; andFig. 8 is a detail showing. the shape of the front end of the. pivotedguide or bar 0 1 The bedlate A, the overhanging arm A, a

' the needle-bar A, adapted to be reciprocated in the needle bar-guidingblocli' or head A, pivoted at 2 upon point-screws,'the main shaft "96 Aextended through the-overhanging armto actuate the needle bar, thevertical shaft A, (shown in Fig. 1,) it having at its lower end a diskB, the connecting-rod B, attached-tothe rocking lever 13*, having itsfulcrum at B and 9 5 connected with an arm B, fast upon the shaft,having at its upperend'the shuttle-carrier B (seeFig. 4,) thefeed-barB,with the excep tion of the direction'i n which its teeth point, andthe toothed gear a on the shaft A, the, loo:

; right it acts to lift the free end of the bar 0 cord being permittedto cxtendfrom one to the next button-hole of the series, it passingalong and connecting the inner ends of the operator.

.it being understood, however, that the head carrying the needle-bar isvibrated in the arc of a circle about its pivotal point 2 prior 'to thedescent of the needle in making each stitch, so that the needlepenetrates the material in such manner as to make what is well known asan. overstitch. To adapt this machine to perform the special work ofsecuring stay-cords and thrum-ends to button-hole pieces for boots andshoes by a blind stitch, which will not penetrate the material, I havehad to change the machine referred to by removing the crank-pin bcarried by the disk 13 to a point diametrically opposite that at whichit stands in the machine referred to, and in place of the 'usualfeed-dog I have applied to the machine another feeddog exactly like itin cveryparticular, except that the feeding-points are extended towardthe operator rather than away from him, as; in the said machine, thesechanges enabling 1 terial so folded and emerge from the same the feed toengage the material and feed toward the operator rather than away fromthe I To the body of the machine so i q altered I have secured by,a bolt0 a-block O,

upon which, by pivot-screws G I have pivand receiving upon it thepresser-foot I). The bar 0 is acted upon by a spring ,Gflwhich normallykeeps the front end of the bar f pressed down toward the feed, the leverhaving a cam-like end, so that when turned over from its position, Fig.1, fully to the away from the feed to permit the work to be applied.

, In thestitching of button-holes in buttonhole pieces for boot and shoework the button-holes are overstitched, and the overstitching goingaround the edges of the button-hole also cover and inclose at the underside of the material a stay-cord, the said stayl ll b n-holes.

In the stitching of button-holes, as desc ib d,

riedJJy ainee lo and the other by a shuttle and when one button-holehasbeen stitched and the material is to be moved into position to have asecond button-hole stitched the nee-' dle-thread is cut off, leaving anend attached to the work; but the shuttle-thread is not cut,

it beinglcft to extend parallel with the staycord, as described, to thenext button-hole. After the button-holes have been completed in thebutton-piece, it becomes necessary to confine the stay-cord and the endof the needle-thread, which are denominated thrum ends, to the underside of the material, and it is the object of my present invention to dothis automatically in a novel manner. A button-hole piece having had itsseries of buttonholes overstitched, as described, will be taken to themachine herein described, and the button-hole piece will be folded atone end over the end of the guide or bar C parallel to the length of thebuttonholes, and so as .to leave-' the stay-cord substantially in theline of the descent of the needle, the main body of the materiallyingabove the guide .0 andhetweenf it and the presser-foot D. It-wil1be noticed in ,Fig. 4 end of thepresser-foot is cut out, leavin a thatthe front V-shaped opening, which by its converging the needle 6, itbeing supplied in usual manner with thread, will pass through theinaside thereof,but without penetrating through to the opposite side ofthe material, the loop of needle-thread will be locked in usual mannerby the shuttle-thread. Then the needle .will rise,- the feed will act tomove the material for the length of a stitch, and theneodle-bar-carrying head will be swung upon its pivot, so that at thenext descent of the needle it Will again penetrate-the material in likemanner, but at the opposite side of the staycord and thrum ends, and astitch will be made, this operation being repeated until the stay-cordand thrum ends throughout the length of the button-piece have beencovered by stitches made from the needle and shuttle thread. i r a Themethod of operation herein described LOO is more fully explained in andmade the sub- 1 24th day of March, 1888, and the button-piece such asherein described forms thesub'iectmatter of a patent of the United.States, No.

380,731, dated April 10, 1888. i

The guide, 0 has to be adjusted forward and backward with relationto'the ,neeldle,

according to the depth that it is desired the needle shall penetrateintothe materialfrom the under-side of the hutton-piece arndto accommodatefor this'the adjusting-screws 0 i which are threaded into the ears ofthe bar or guide .O and rest against the block (3, may

,The shape of the front end of the bar 0 over which the button-piece isfolded, is'best shown in Fig. 8;

I clain1 v t 1. -In a machine for stitching stay-cords and thrum ends,stitch -forming mechanism and feeding mechanism to produce an'overseaming-stitoh, the feeding-bar having its teeth formed to move the'material toward the toe of the presser-foot, combined with a presser Dand thruin-gatliering surfaces, and with the bar or guide 0 interposedbetween the feed and presser-foot and over Which the material to bestitched is bent, as described, whereby the needle at one descent ismade to enter and emerge from the same side of the material at one sideof the stay-cord and thruln ends, and at its next descent to enter andemerge from the same side of the material, but at the opposite side ofthe said stay-cord and thruni ends, to operate substanti ally asdescribed.

2. In a sewing-machine for securingv the v stay-cord and thrnm ends inthe stitching of talities, viz: aneye-pointed thread-carrying needle andcomplemental stitch forming and feeding mechanism to produce anoverseaming-stitch as desired, means to collect the thrum ends parallelto and about the staycord, a guide or bar having itsv effective end atright angles to the direction of the feed of the material, the needle inits operation 'entering'the material and emerging therefrom at one andthe same side thereof, and at one sid e of the-collected stay-cord andthrum ends, and at its next descent entering said material in likemanner, but at the other side of the collected stay-cord and thrum ends,the combination being and operating substantially as described. I

In testimony whereof I have signed my name to thisspecification in thepresence of two subscribing witnesses.

- ALBERTSHEA v Witnesses:

G. W. GREGORY, O. M. CONE.

